Issue 3, 2017
From the journal:

Chemical Communications

Spectroscopic evidence for origins of size and support effects on selectivity of Cu nanoparticle dehydrogenation catalysts†

M. E. Witzke, ORCID logo ‡a   P. J. Dietrich,‡b   M. Y. S. Ibrahim,a   K. Al-Bardan,a   M. D. Triezenberga  and  D. W. Flaherty*a  

* Corresponding authors

a Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, USA
E-mail: dwflhrty@illinois.edu

b BP Group Research, Naperville, USA

Abstract

Selective dehydrogenation catalysts that produce acetaldehyde from bio-derived ethanol can increase the efficiency of subsequent processes such as C–C coupling over metal oxides to produce 1-butanol or 1,3-butadiene or oxidation to acetic acid. Here, we use in situ X-ray absorption spectroscopy and steady state kinetics experiments to identify Cuδ+ at the perimeter of supported Cu clusters as the active site for esterification and Cu0 surface sites as sites for dehydrogenation. Correlation of dehydrogenation and esterification selectivities to in situ measures of Cu oxidation states show that this relationship holds for Cu clusters over a wide-range of diameters (2–35 nm) and catalyst supports and reveals that dehydrogenation selectivities may be controlled by manipulating either.

Graphical abstract: Spectroscopic evidence for origins of size and support effects on selectivity of Cu nanoparticle dehydrogenation catalysts

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Article information

DOI
https://doi.org/10.1039/C6CC08305F
Article type
Communication
Submitted
14 Oct 2016
Accepted
12 Dec 2016
First published
12 Dec 2016

Chem. Commun., 2017,53, 597-600

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Spectroscopic evidence for origins of size and support effects on selectivity of Cu nanoparticle dehydrogenation catalysts

M. E. Witzke, P. J. Dietrich, M. Y. S. Ibrahim, K. Al-Bardan, M. D. Triezenberg and D. W. Flaherty, Chem. Commun., 2017, 53, 597 DOI: 10.1039/C6CC08305F

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